<template>
  <header class="header">
    <h1>todos</h1>
    <input id="toggle-all" class="toggle-all" type="checkbox" v-model="allchange">
    <label for="toggle-all"></label>
    <input
      class="new-todo"
      placeholder="输入任务名称-回车确认"
      autofocus
      v-model="val"
      @keydown.enter="add(val)"
    />
  </header>
</template>

<script>
export default {
  props:["list"],
  data(){
    return {
      val:'',
    }
  },
  methods:{
    add(val){
      this.$emit('add',val)
      this.val=''
    }
  },
  computed:{
    allchange:{
      set(val){
        this.list.forEach(item=>item.isDone=val)
      },
      get(){
       return this.list.every(item=>item.isDone)
      }
    }
  }
}
</script>